WO2013015251A1

WO2013015251A1 - Therapeutic treatment apparatus

Info

Publication number: WO2013015251A1
Application number: PCT/JP2012/068610
Authority: WO
Inventors: 新二安永
Original assignee: オリンパス株式会社
Priority date: 2011-07-25
Filing date: 2012-07-23
Publication date: 2013-01-31
Also published as: EP2737867A1; EP2737867A4; US20140142562A1; EP2737867B1; US9510890B2; JP5820649B2; JP2013022354A

Abstract

The therapeutic treatment apparatus (100), which is an apparatus for treating living tissue by heating at a target temperature, comprises: a treatment implement (120); a control device (170); and storage units (123, 187). The treatment implement (120) has heat-conducting parts (132, 134) that contact the living tissue and conduct heat to the living tissue, and resistance elements (140) that heat the heat-conducting parts (132, 134) as a result of the input of electric power. The control device (170) can be attached to and detached from the therapeutic implement (120) and measures the resistance of the resistance elements (140). The storage units (123, 187) store coefficients (C2). When the therapeutic implement and the control device are connected, the control device (170) calculates a coefficient (C1) based on a correction temperature. The control device (170) calculates the temperature of the resistance elements using the resistance, coefficient (C1), and coefficient (C2), and controls the temperature of the heat-conducting parts using said temperature.

Description

Therapeutic treatment device

The present invention relates to a therapeutic treatment apparatus.

Generally, a treatment apparatus for treatment that treats a living tissue using thermal energy is known. For example, Japanese Patent Application Laid-Open No. 2001-190561 discloses the following therapeutic treatment apparatus. This therapeutic treatment apparatus has an openable and closable holding portion that holds a biological tissue to be treated. In this holding portion, a resistance element that functions as a heater for heating the holding portion is arranged. Such a therapeutic treatment apparatus can anastomose living tissues by holding the living tissues with a holding portion and heating the grasped portions of the living tissues. Japanese Patent Application Laid-Open No. 2001-190561 discloses a control method for supplying a predetermined amount of power and temperature measurement based on a change in resistance value of the resistance element. However, a method of controlling a resistance element to a predetermined temperature by feedback control is disclosed.

In the use of the therapeutic treatment apparatus as described above, the area of the living tissue grasped by the holding portion at the time of anastomosis is not constant, and generally differs depending on the treatment. For this reason, in the control method in which the amount of electric power applied to the resistance element functioning as a heater is a predetermined constant value, the anastomosis temperature differs for each treatment. As a result, the bonding strength may become unstable. On the other hand, in the method of measuring the temperature based on the resistance value change of the resistance element and controlling the resistance element to a predetermined temperature by feedback control, it is necessary to accurately acquire the resistance value and temperature characteristics of the resistance element in advance. . For this purpose, it is necessary to manage the uniformity of the resistance element with high accuracy at the time of manufacture or to accurately measure the resistance-temperature characteristics of the resistance element for each individual. As a result, the cost of the device increases.

Therefore, the present invention can calculate the temperature of the resistance element from the resistance value and accurately control the temperature at a low cost without having to individually acquire the relationship between the resistance value and the temperature of the resistance element in advance. It is an object of the present invention to provide a therapeutic treatment apparatus.

To achieve the above object, according to one aspect of the present invention, a therapeutic treatment apparatus is a therapeutic treatment apparatus for heating and treating a biological tissue at a target temperature, and the therapeutic treatment apparatus is in contact with the biological tissue. A treatment tool having a heat transfer section that transfers heat to a living tissue, and a resistance element that heats the heat transfer section when electric power is applied, and a treatment tool that is detachable from the treatment tool, and a resistance value of the resistance element A control device that can measure R and supplies power to the resistance element to control the temperature of the heat transfer unit to heat the living tissue at the target temperature, and is provided in the treatment instrument or the control device A storage unit for storing the coefficient C2, and the control device calculates the coefficient C1 based on a calibration temperature in a state where the treatment tool and the control device are connected, and the resistance element Of the resistance value R and the coefficient C1. And calculated by T = C1 × R + C2 by using the coefficient C2, the controlling the temperature of the heat transfer unit using a temperature T, it is characterized.

According to the present invention, since the coefficient C2 stored in advance and the coefficient C1 calculated in a state where the treatment tool and the control device are connected are used, the relationship between the resistance value of the resistance element and the temperature is individually determined in advance. It is possible to provide a therapeutic treatment apparatus that can perform accurate temperature control by calculating the temperature of a resistance element from its resistance value at a low cost without having to obtain it.

FIG. 1 is a schematic diagram showing a configuration example of a therapeutic treatment system according to an embodiment of the present invention. FIG. 2A is a schematic cross-sectional view illustrating a configuration example of a shaft and a holding unit of the energy treatment device according to the embodiment of the present invention, and is a diagram illustrating a state in which the holding unit is closed. FIG. 2B is a schematic cross-sectional view illustrating a configuration example of the shaft and the holding unit of the energy treatment device according to the embodiment of the present invention, and is a diagram illustrating a state in which the holding unit is opened. FIG. 3A is a plan view illustrating an outline of a configuration example of a first holding member of the holding unit according to the embodiment of the present invention. FIG. 3B is a diagram schematically illustrating a configuration example of the first holding member of the holding unit according to the embodiment of the present invention, and is a longitudinal sectional view taken along line 3B-3B in FIG. 3A. FIG. 3C is a diagram schematically illustrating a configuration example of the first holding member of the holding unit according to the embodiment of the present invention, and is a cross-sectional view taken along line 3C-3C in FIG. 3A. FIG. 4A is a top view illustrating an outline of a configuration example of a heat generating chip according to an embodiment of the present invention. FIG. 4B is a diagram schematically illustrating a configuration example of the heat generating chip according to the embodiment of the present invention, and is a cross-sectional view taken along line 4B-4B illustrated in FIG. 4A. FIG. 5 is a diagram illustrating a configuration example of a control device according to an embodiment of the present invention. FIG. 6 is a diagram illustrating an outline of an example of a configuration related to a heating treatment of the therapeutic treatment apparatus according to the embodiment of the present invention. FIG. 7 is a flowchart showing an example of processing by the control unit of the therapeutic treatment apparatus according to the embodiment of the present invention. FIG. 8 is a flowchart showing an example of an initial setting process by the control unit of the therapeutic treatment apparatus according to the embodiment of the present invention. FIG. 9 is a flowchart showing an example of the heating treatment execution process by the control unit of the therapeutic treatment apparatus according to the embodiment of the present invention.

An embodiment of the present invention will be described with reference to the drawings. The therapeutic treatment apparatus according to the present embodiment is an apparatus for use in the treatment of living tissue, and is an apparatus that causes high-frequency energy and thermal energy to act on the living tissue. As shown in FIG. 1, the therapeutic treatment device 100 includes an energy treatment tool 120, a control device 170, and a foot switch 216.

The energy treatment tool 120 is a linear type surgical treatment tool for performing treatment by, for example, penetrating the abdominal wall. The energy treatment device 120 includes a handle 222, a shaft 224 attached to the handle 222, and a holding portion 125 provided at the tip of the shaft 224. The holding unit 125 can be opened and closed, and is a treatment unit that holds a living tissue to be treated and performs a treatment such as coagulation or incision of the living tissue. Hereinafter, for the sake of explanation, the holding portion 125 side is referred to as a distal end side, and the handle 222 side is referred to as a proximal end side. The handle 222 includes a plurality of operation knobs 232 for operating the holding unit 125. Further, a nonvolatile memory 123 is provided in the handle 222 portion. As will be described in detail later, the memory 123 stores unique information such as an individual identification number unique to the energy treatment instrument 120 and a unique coefficient C2 used for temperature control. The shape of the energy treatment device 120 shown here is, of course, an example, and other shapes may be used as long as they have the same function. For example, the shape may be a forceps or the shaft may be curved.

The handle 222 is connected to the control device 170 via the cable 160. Here, the cable 160 and the control device 170 are connected by a connector 165, and this connection is detachable. That is, the therapeutic treatment apparatus 100 is configured so that the energy treatment tool 120 can be exchanged for each treatment. A foot switch 216 is connected to the control device 170. The foot switch 216 operated with a foot may be replaced with a switch operated with a hand or other switches. When the operator operates the pedal of the foot switch 216, the supply of energy from the control device 170 to the energy treatment tool 120 is switched ON / OFF.

An example of the structure of the holding part 125 and the shaft 224 is shown in FIGS. 2A and 2B. 2A shows a state in which the holding unit 125 is closed, and FIG. 2B shows a state in which the holding unit 125 is opened. The shaft 224 includes a cylindrical body 242 and a sheath 244. The cylindrical body 242 is fixed to the handle 222 at its proximal end. The sheath 244 is disposed on the outer periphery of the cylindrical body 242 so as to be slidable along the axial direction of the cylindrical body 242.

A holding portion 125 is disposed at the tip of the cylindrical body 242. The holding unit 125 includes a first holding member 127 and a second holding member 128. The base portion of the first holding member 127 is fixed to the distal end portion of the cylindrical body 242 of the shaft 224. On the other hand, the base of the second holding member 128 is rotatably supported by a support pin 256 at the tip of the cylindrical body 242 of the shaft 224. Therefore, the second holding member 128 rotates around the axis of the support pin 256 and opens or closes with respect to the first holding member 127.

In a state where the holding portion 125 is closed, the cross-sectional shape of the base portion of the first holding member 127 and the base portion of the second holding member 128 is circular. The second holding member 128 is biased by an elastic member 258 such as a leaf spring so as to open with respect to the first holding member 127. When the sheath 244 is slid to the distal end side with respect to the cylindrical body 242, and the base portion of the first holding member 127 and the base portion of the second holding member 128 are covered by the sheath 244, as shown in FIG. The first holding member 127 and the second holding member 128 are closed against the urging force. On the other hand, when the sheath 244 is slid to the proximal end side of the cylindrical body 242, the second holding member 128 opens with respect to the first holding member 127 by the urging force of the elastic member 258, as shown in FIG. 2B.

The cylindrical body 242 includes a high-frequency electrode energization line 268 connected to a first high-frequency electrode 132 or a second high-frequency electrode 134 described later, and a heat-generating chip energization line 162 connected to the heat-generating chip 140 that is a heat-generating member. And are inserted. A drive rod 252 connected to one of the operation knobs 232 on the proximal end side is disposed in the cylinder 242 so as to be movable along the axial direction of the cylinder 242. On the distal end side of the drive rod 252, a thin plate-like cutter 254 having a blade formed on the distal end side is disposed. When the operation knob 232 is operated, the cutter 254 is moved along the axial direction of the cylindrical body 242 via the drive rod 252. When the cutter 254 moves to the front end side, the cutter 254 is accommodated in

cutter guide grooves

264 and 274 described later formed in the holding portion 125.

The first holding member 127 has a first holding member main body 262, and the second holding member 128 has a second holding member main body 272. As shown in FIGS. 3A, 3B and 3C, the first holding member main body 262 is formed with a cutter guide groove 264 for guiding the cutter 254 described above. The first holding member main body 262 is provided with a recess, in which a first high-frequency electrode 132 formed of, for example, a copper thin plate is disposed. Since the first high-frequency electrode 132 has the cutter guide groove 264, the planar shape thereof is substantially U-shaped as shown in FIG. 3A.

Further, as will be described in detail later, a plurality of heat generating chips 140 are joined to the surface of the first high-frequency electrode 132 on the first holding member main body 262 side. A sealing film 265 is formed by applying a sealing agent made of, for example, silicone so as to cover the heating chip 140, the wiring to the heating chip 140, and the first high-frequency electrode 132. As shown in FIGS. 2A and 2B, a high-frequency electrode conducting line 268 is electrically connected to the first high-frequency electrode 132. The first high-frequency electrode 132 is connected to the cable 160 through the high-frequency electrode conducting line 268.

The second holding member 128 has a shape symmetric to the first holding member 127. That is, the cutter guide groove 274 is formed in the second holding member 128 at a position facing the cutter guide groove 264. In addition, the second holding member main body 272 is provided with a second high-frequency electrode 134 at a position facing the first high-frequency electrode 132. The second high-frequency electrode 134 is connected to the cable 160 via a high-frequency electrode energization line 268.

When the holding unit 125 in the closed state grips the living tissue, the gripped living tissue comes into contact with the first high-frequency electrode 132 and the second high-frequency electrode 134. The first holding member 127 and the second holding member 128 further have a mechanism for heat generation in order to cauterize the living tissue in contact with the first high-frequency electrode 132 and the second high-frequency electrode 134. The heat generating mechanism provided in the first holding member 127 and the heat generating mechanism provided in the second holding member 128 have the same form. Here, the heat generating mechanism formed on the first holding member 127 will be described as an example.

First, the heat generating chip 140 constituting the heat generating mechanism will be described with reference to FIGS. 4A and 4B. Here, FIG. 4A is a top view, and FIG. 4B is a cross-sectional view taken along line 4B-4B shown in FIG. 4A. The heat generating chip 140 is formed using an alumina substrate 141. A resistance pattern 143 that is a Pt thin film for heat generation is formed on one surface of the main surface of the substrate 141. In addition, rectangular electrodes 145 are formed on the surface of the substrate 141 in the vicinity of the two short sides of the rectangle. Here, the electrode 145 is connected to each end of the resistance pattern 143. An insulating film 147 made of, for example, polyimide is formed on the surface of the substrate 141 including the resistance pattern 143 except for the portion where the electrode 145 is formed.

A bonding metal layer 149 is formed on the entire back surface of the substrate 141. The electrode 145 and the bonding metal layer 149 are multilayer films made of, for example, Ti, Cu, Ni, and Au. The electrodes 145 and the bonding metal layer 149 have stable strength against soldering or the like. The bonding metal layer 149 is provided so that the bonding is stable when the heat generating chip 140 is soldered to the first high-frequency electrode 132, for example.

The heat generating chip 140 is disposed on a surface (second main surface) opposite to the surface (first main surface) of the first high-frequency electrode 132 and the second high-frequency electrode 134 in contact with the living tissue. . Here, the heat generating chip 140 is fixed by soldering the surface of the bonding metal layer 149 and the second main surface of the first high-frequency electrode 132 or the second high-frequency electrode 134, respectively.

The case of the first high-frequency electrode 132 will be described as an example with reference to FIGS. 3A, 3B, and 3C. Six heating chips 140 are discretely arranged on the first high-frequency electrode 132. That is, three heat generating chips 140 are arranged in two rows symmetrically across the cutter guide groove 264 from the base end side toward the tip end side.

The resistance patterns 143 of the heat generating chips 140 are connected in series via the electrodes 145. Adjacent electrodes 145 are connected by a wire 163 formed by, for example, wire bonding. A pair of heat generating chip energization lines 162 are connected to both ends of the heat generating chips connected in series. The pair of heating chip energization lines 162 is connected to the cable 160. In this way, the heat generating chip 140 is connected to the control device 170 via the wire 163, the heat generating chip conducting line 162 and the cable 160. The control device 170 controls the electric power supplied to the heat generating chip 140.

As described above, in the present embodiment, the plurality of heat generating chips 140 are disposed on the first high-frequency electrode 132, but this is for improving the temperature uniformity of the first high-frequency electrode 132. The entire six heat generating chips 140 can be regarded as a single heat generating chip. On the first high-frequency electrode 132, a sealing agent made of, for example, silicone is applied so as to cover the heat generating chip 140 and the heat generating chip energization line 162, and the sealing film 265 is shown in FIGS. 3A, 3B, and 3C. It is formed as follows.

The current output from the control device 170 flows through the resistance patterns 143 of the six heat generating chips 140. As a result, each resistance pattern 143 generates heat. When the resistance pattern 143 generates heat, the heat is transmitted to the first high-frequency electrode 132. The living tissue in contact with the first high-frequency electrode 132 is cauterized by this heat.

In order to efficiently transmit the heat generated in the heat generating chip 140 to the first high-frequency electrode 132, the sealing film 265 and the first holding member body 262 around the sealing film 265 have heat of the first high-frequency electrode 132 and the substrate 141. It is preferable to have a thermal conductivity lower than the conductivity. Since the thermal conductivity of the sealing film 265 and the first holding member body 262 is low, thermal conduction with less loss is realized.

As shown in FIG. 5, the control device 170 includes a control unit 180, a high frequency energy output circuit 181, a heat generating chip drive circuit 182, an input unit 185, a display unit 186, a storage unit 187, and a speaker. 188 and a temperature sensor 189 are disposed. The control unit 180 is connected to each unit in the control device 170 and controls each unit of the control device 170. The high frequency energy output circuit 181 is connected to the energy treatment device 120, and drives the first high frequency electrode 132 and the second high frequency electrode 134 of the energy treatment device 120 under the control of the control unit 180. That is, the high-frequency energy output circuit 181 applies a high-frequency voltage to the first high-frequency electrode 132 and the second high-frequency electrode 134 via the high-frequency electrode conducting line 268.

The heat generating chip driving circuit 182 is connected to the energy treatment tool 120 and drives the heat generating chip 140 of the energy treatment tool 120 under the control of the control unit 180. That is, the heat generating chip driving circuit 182 supplies power to the resistance pattern 143 of the heat generating chip 140 for heating through the heat generating chip energization line 162 under the control of the control unit 180. Here, the heat generating chip drive circuit 182 can change the amount of power supplied to the heat generating chip 140. The heating chip driving circuit 182 has a function of measuring a current that flows when a voltage is applied to the heating chip 140. The heat generating chip driving circuit 182 outputs the measured current value to the control unit 180.

The resistance value of the resistance pattern 143 changes according to the temperature of the resistance pattern 143. Therefore, if there is a relationship between the temperature of the resistance pattern 143 and the resistance value, the control unit 180 can acquire the temperature of the resistance pattern 143 based on the resistance value of the resistance pattern 143. The control unit 180 calculates the resistance value of the resistance pattern 143 based on the voltage value applied to the resistance pattern 143 and the current value flowing at that time acquired from the heating chip drive circuit 182. Further, the control unit 180 calculates the temperature of the resistance pattern 143 based on the relationship between the temperature of the resistance pattern 143 and the resistance value.

Further, the control unit 180 calculates the relationship between the temperature of the resistance pattern 143 and the resistance value in order to acquire the temperature of the resistance pattern 143 as described above. More specifically, when the energy treatment tool 120 and the control device 170 are connected via the connector 165, the control unit 180 reads out the unique information of the energy treatment tool 120 from the memory 123. Further, the control unit 180 applies a minute voltage to the resistance pattern 143 of the heat generating chip 140 and acquires the resistance value of the resistance pattern 143 from the current value flowing at that time. Further, the control unit 180 acquires the environmental temperature as the calibration temperature from the temperature sensor 189. The control unit 180 calculates the relationship between the temperature and resistance value of the resistance pattern 143 from the characteristics of the energy treatment tool 120, the resistance value of the resistance pattern 143, and the environmental temperature. Further, as will be described in detail later, the control unit 180 has a value relating to the relationship between the individual identification number of the energy treatment instrument 120 and the calculated temperature and resistance value among the unique information read from the memory 123, that is, detailed later. The coefficient C1 to be stored is stored in the storage unit 187.

A foot switch (SW) 216 is connected to the control unit 180, and ON from which the treatment by the energy treatment tool 120 is performed and OFF from which the treatment is stopped are input from the foot switch 216. The input unit 185 inputs various settings of the control unit 180. The display unit 186 displays various types of information on the treatment apparatus 100 under the control of the control unit 180. The storage unit 187 stores various data necessary for the operation of the control device 170. The speaker 188 outputs an alarm sound or the like. The temperature sensor 189 measures the environmental temperature.

FIG. 6 shows a schematic diagram in which a portion related to the heating treatment is extracted from the therapeutic treatment apparatus 100 described above. As shown in this figure, the heat treatment is performed by an energy treatment device 120 including a holding unit 125 having a first high-frequency electrode 132, a second high-frequency electrode 134, and a heating chip 140, and a memory 123. Control of the energy treatment tool 120 is performed by a control device 170 having a control unit 180, a heat generating chip drive circuit 182, a storage unit 187, and a temperature sensor 189. The energy treatment tool 120 and the control device 170 are connected by a detachable cable 160 using a connector 165 provided on the control device 170 side. Note that the configuration related to the high-frequency treatment and the cutter described above is not necessarily required in the treatment apparatus for treatment 100 according to the present invention.

Thus, for example, the first high-frequency electrode 132 or the second high-frequency electrode 134 functions as a heat transfer unit that contacts the living tissue and transfers heat to the living tissue. For example, the heat generating chip 140 functions as a resistance element that heats the heat transfer section when power is supplied. For example, the energy treatment device 120 functions as a treatment device having a heat transfer section and a resistance element. For example, the control device 170 can measure the resistance value R of the resistance element, and functions as a control device that controls the temperature of the heat transfer section by supplying power to the resistance element in order to heat the living tissue at the target temperature. For example, the memory 123 functions as a storage unit for storing the coefficient C2. For example, the temperature sensor 189 functions as a temperature sensor for measuring the environmental temperature. For example, the storage unit 187 functions as a calculated coefficient storage unit.

Next, the operation of the therapeutic treatment apparatus 100 according to this embodiment will be described. FIG. 7 shows a flowchart showing the processing by the control unit 180. In step S101, the control unit 180 determines whether the cable 160 to which the energy treatment device 120 is connected is connected to the control device 170 via the connector. When not connected, the control unit 180 repeats step S101. On the other hand, if the control unit 180 determines that the cable 160 to which the energy treatment device 120 is connected is connected to the control device 170, the process proceeds to step S102. In step S102, the control unit 180 executes an initial setting process that is a predefined process. This initial setting process will be described later in detail.

In step S103, the control unit 180 executes an output setting process that is a predefined process. In the output setting process, the control unit 180 receives the operator's instruction via the input unit 185, and outputs the treatment conditions of the treatment apparatus 100, for example, the set power of the high frequency energy output, the target temperature Top by the thermal energy output, the heating Set time top and the like. Here, the operator may individually set each value, or the operator selects a set of setting values according to the technique, and the control unit 180 determines the output condition based on the selection. You may make it do.

The holding part 125 and the shaft 224 of the energy treatment device 120 are inserted into the abdominal cavity through the abdominal wall, for example. The surgeon operates the operation knob 232 to open and close the holding portion 125, and grips the living tissue to be treated by the first holding member 127 and the second holding member 128. At this time, the first main surface of both the first high-frequency electrode 132 provided on the first holding member 127 and the second high-frequency electrode 134 provided on the second holding member 128 is subjected to treatment. Living tissue is in contact.

In step S104, the control unit 180 repeats the determination as to whether or not an instruction to start a high-frequency treatment by the operator has been input. When the operator grasps the biological tissue to be treated with the holding unit 125, the operator operates the foot switch 216. For example, the foot switch 216 is switched ON, and the control unit 180 determines that an instruction to start high frequency treatment has been input. At this time, in step S105, the control unit 180 executes a high-frequency treatment execution process. In the high frequency treatment execution process, high frequency power of set power is supplied from the high frequency energy output circuit 181 of the control device 170 to the first high frequency electrode 132 and the second high frequency electrode 134 via the cable 160. The supplied power is, for example, about 20W to 80W. As a result, the living tissue generates heat and the tissue is cauterized. By this cauterization, the tissue is denatured and solidified. After the elapse of the predetermined time or based on the operator's instruction, the control unit 180 stops the output of the high-frequency energy, and the high-frequency treatment execution process ends.

In step S106, the control unit 180 repeats the determination of whether or not an instruction to start the heating treatment by the operator has been input. For example, when the foot switch 216 is switched ON and the control unit 180 determines that an instruction to start the heat treatment is input, the control unit 180 executes the heat treatment execution process in step S107. In the heat treatment execution process, as will be described in detail later, the control device 170 supplies power to the heat generating chip 140 so that the temperature of the first high-frequency electrode 132 becomes the target temperature. Here, the target temperature is about 200 ° C., for example. At this time, the current flows from the heating chip drive circuit 182 of the control device 170 through the resistance pattern 143 of each heating chip 140 via the cable 160 and the heating chip energization line 162. The resistance pattern 143 of each heat generating chip 140 generates heat by current.

The heat generated in the resistance pattern 143 is transmitted to the first high-frequency electrode 132 through the substrate 141 and the bonding metal layer 149. As a result, the temperature of the first high-frequency electrode 132 rises. Similarly, the temperature of the second high-frequency electrode 134 also rises due to the heat generated by the current flowing through each heat generating chip 140 disposed on the second high-frequency electrode 134. The living tissue in contact with the first main surface of the first high-frequency electrode 132 or the second high-frequency electrode 134 is further cauterized and further solidified by these heats. When the living tissue is solidified by heating, the output of heat energy is stopped, and the heat treatment execution procedure is ended. As described above, a series of processing by the control unit 180 ends. Finally, the operator operates the operation knob 232 to move the cutter 254 and cut the living tissue. The treatment of the living tissue is thus completed.

In the heating treatment as described above, high accuracy is required for temperature control in heating by the heat generating chip 140. In the present embodiment, the control unit 180 acquires the temperature of the heat generating chip 140 based on the resistance value of the resistance pattern 143. That is, the heat generating chip drive circuit 182 applies a voltage to the resistance pattern 143 under the control of the control unit 180 and measures a current value flowing at that time. The heat generating chip driving circuit 182 outputs the measured current value to the control unit 180. The control unit 180 calculates the resistance value of the resistance pattern 143 based on the voltage value applied to the resistance pattern 143 and the current value acquired from the heating chip drive circuit 182. The control unit 180 calculates the temperature of the resistance pattern 143 based on the relationship between the calculated resistance value, the resistance value of the resistance pattern 143, and the temperature.

A relationship between the resistance value R of the resistance pattern 143 and the temperature T will be described. The temperature of the resistance pattern 143 is given by the following formula (1).
T = C1 × R + C2 (1)
Here, the coefficient C1 and the coefficient C2 are predetermined constants. Therefore, if the coefficient C1 and the coefficient C2 are known, the temperature T can be obtained from the resistance value R of the resistance pattern 143 based on the equation (1). Hereinafter, the coefficient C1 and the coefficient C2 will be described.

When the resistance value R1 at the temperature T1 is set to the resistance value R2 at the temperature T2, the following formulas (2) and (3) are established from the formula (1).
T1 = C1 × R1 + C2 (2)
T2 = C1 × R2 + C2 (3)
Here, the ratio of the resistance values R1 and R2 is α. That is, it is set as the following formula (4).
α = R2 / R1 (4)
Then, the following equation (5) is obtained from the equations (2), (3), and (4).
C2 = (T1 × α−T2) / (α−1) (5)
Here, α is a value determined by the material of the resistance pattern 143. That is, it does not depend on the line width or thickness of the resistance pattern 143 that causes non-uniformity in the manufacturing process. Therefore, in the heat generating chip 140 having the same structure using the same material, the difference in coefficient C2 between individuals is very small. In order to derive the coefficient C2, it is necessary to measure the resistance value at two different temperatures. However, since the difference between individuals is small, it is not necessary to measure all of the heat generating chips 140. For example, by performing a sampling inspection for each manufacturing lot of the heat generating chips 140 and calculating an average value, the measurement can be performed with sufficient accuracy. The coefficient C2 of the heating chip 140 of the lot can be obtained.

When the coefficient C2 is known, the resistance value R of the resistance pattern 143 at a certain temperature T is expressed by the following formula (6).
C1 = (T−C2) / R (6)
As is apparent from this equation, if the coefficient C2 is known, the coefficient C1 can be obtained by measuring the resistance value at one temperature.

Here, the coefficient C1 depends on the line width and thickness of the resistance pattern 143, and relatively large non-uniformity is likely to occur in the manufacturing process. Therefore, it is desired to measure the coefficient C1 for each individual treatment instrument.

From the above, in this embodiment, the coefficient C2 is obtained in advance by, for example, an average value of sampling inspection for each production lot. The value of the coefficient C2 is stored in the memory 123 provided in the energy treatment device 120 as described above. On the other hand, the coefficient C1 is measured in the initial setting process during use.

An example of the initial setting process in the present embodiment will be described with reference to the flowchart shown in FIG. In step S201, the control unit 180 reads the individual identification number of the energy treatment device 120 and the value of the coefficient C2 from the memory 123 of the energy treatment device 120. In step S202, the control unit 180 determines whether or not the coefficient C1 corresponding to the individual identification number is stored in the storage unit 187.

If it is determined in step S202 that the coefficient C1 corresponding to the individual identification number is not stored in the storage unit 187, the process proceeds to step S203. In step S203, the control unit 180 acquires the environmental temperature Tm measured from the temperature sensor 189 provided in the control device 170. In the present embodiment, the environmental temperature Tm is set as a calibration temperature that is a temperature used for calculating the coefficient C1. In step S <b> 204, the control unit 180 instructs the heating chip driving circuit 182 to apply the minute voltage Vm to the resistance pattern 143 of the heating chip 140. In step S205, the control unit 180 instructs the heat generating chip driving circuit 182 to measure the current Im flowing through the resistance pattern 143, and acquires the measured current Im.

In step S206, the control unit 180 calculates the resistance value Rm of the resistance pattern 143 based on the following equation (7).
Rm = Vm / Im (7)
Further, based on the obtained Rm, the coefficient C2 acquired in step S201, the environmental temperature Tm measured in step S203, and the expression (6), the coefficient C1 is calculated by the following expression (8).
C1 = (Tm−C2) / Rm (8)
Since this measurement is performed immediately after connection of the cable 160 to the connector 165, the temperature of the heat generating chip can be regarded as being equal to the environmental temperature.

In step S207, the control unit 180 associates the individual identification number read in step S201 with the coefficient C1 calculated in step S206 and stores it in the storage unit 187. In step S208, the control unit 180 instructs the heat generating chip drive circuit 182 to stop applying the minute voltage Vm to the resistance pattern 143. Thereafter, the processing returns to step S102 of the processing shown in FIG. 7 using the coefficients C1 and C2 as return values.

On the other hand, if it is determined in step S202 that the coefficient C1 corresponding to the individual identification number is stored in the storage unit 187, the control unit 180 does not calculate the coefficient C1 in step S209, but stores the coefficient C1. The coefficient C1 corresponding to the stored individual identification number is read out. Thereafter, the processing returns to step S102 using the coefficients C1 and C2 as return values.

Note that the processing procedure shown here is an example, and the processing order can be changed as appropriate. For example, step S203 can be performed after step S205, and step S208 can be performed after step S205.

In the present embodiment, in the heat treatment execution process in step S107, feedback control of the electric power supplied to the heat generating chip 140 is performed using the coefficients C1 and C2 obtained as described above. The heat treatment execution process will be described with reference to the flowchart shown in FIG.

In step S301, the control unit 180 sets various parameters to initial values, and causes the heat generation chip drive circuit 182 to start supplying power to the resistance pattern 143. For example, the elapsed time t is set to 0, the input power P is set to the initial input power P0, and the voltage Vd applied to the resistance pattern 143 is set to the initial applied voltage Vd_0.

In step S <b> 302, the control unit 180 calculates the resistance value R of the resistance pattern 143 based on the voltage Vd applied to the resistance pattern 143 and the current I flowing at this time acquired from the heat generation chip drive circuit 182. In step S303, the control unit 180 calculates the temperature T of the resistance pattern 143 based on Expression (1). In step S304, the control unit 180 calculates the power P to be input to the resistance pattern 143 by the following equation (9).
P = C3 × (Top−T) + Pnow (9)
Here, C3 is a control gain, which is given a predetermined value. Top is the target temperature, and Pnow is the power that is currently input. Here, simple proportional control with a control gain of C3 is used, but PID control may be used in order to perform more stable control.

In step S305, the control unit 180 calculates the applied voltage V based on the following equation (10).
V = (P × R) ^0.5 (10)
In step S <b> 306, the control unit 180 instructs the heat generating chip driving circuit 182 to apply the calculated applied voltage V to the resistance pattern 143.

In step S307, the control unit 180 determines whether or not the elapsed time t is smaller than the treatment time top. If the elapsed time t is smaller than the treatment time top, the process returns to step S302. On the other hand, if the elapsed time t is equal to or longer than the treatment time top, the heat treatment execution process ends, and the process returns to step S107 of the process shown in FIG. As described above, while the processes in steps S302 to S307 are repeated, the power P input to the resistance pattern 143 is feedback-controlled.

According to this embodiment, in order to obtain the coefficient C1 and the coefficient C2, it is not necessary to measure each resistance value at a plurality of temperatures for all the energy treatment tools 120. By storing the coefficient C2 in the energy treatment device 120 in advance and measuring the resistance value at a single temperature, the coefficient C1 can be obtained with high accuracy. For this reason, before using each energy treatment tool 120, the coefficient C1 and the coefficient C2 can be obtained only by measuring the resistance value at the environmental temperature. As a result, since it is not necessary to perform measurement for all the energy treatment tools 120 in the inspection process at the time of manufacture, the cost of the inspection process can be reduced.

Further, in the present embodiment, the measurement of the resistance value Rm when calculating the coefficient C1 is performed by applying the minute voltage Vm, so that the heat generating chip 140 does not become high temperature. Further, since this measurement is performed immediately after the connection of the cable 160 to the connector 165, the temperature of the heat generating chip can be regarded as being equal to the environmental temperature. Compared with the case where the temperature of the heat generating chip is raised or lowered, the temperature T can be obtained stably, so the calculation of the coefficient C1 becomes highly accurate.

Further, since the environmental temperature is used as the calibration temperature in the calculation of the coefficient C1, if the temperature sensor 189 is provided in the control device 170, a temperature sensor for acquiring the temperature of the resistance pattern 143 is provided for each energy treatment tool 120. There is no need to provide it. Further, when the accuracy is somewhat sacrificed or when used in a place where the environmental temperature is stable, the temperature is calibrated on the assumption that the environmental temperature is constant, for example, 25 ° C. without providing the temperature sensor 189. The same treatment can be performed using the temperature.

In addition, according to the present embodiment, the coefficient C1 is measured using the control device 170 that actually drives the energy treatment instrument 120. Therefore, individual differences of the control device 170 such as the parasitic resistance of the internal wiring and the offset of the amplifier. Is corrected. Therefore, the temperature control of the heat generating chip 140 can be performed with higher accuracy.

Also, the value of the coefficient C1 once measured is reused for the same control device 170. Therefore, for example, when the energy treatment tool 120 is temporarily removed from the control device 170 for some reason after the heat treatment treatment and is reconnected without time, the heat generating chip 140 is caused by the residual heat of the heat generating chip 140. Even when there is a large temperature difference between the control device 170 and the temperature sensor 189 of the control device 170, the coefficient C1 is not updated to an incorrect value. In the present embodiment, the calculated value of the coefficient C1 is stored in the storage unit 187, but it goes without saying that the same effect can be obtained even if it is stored in the memory 123.

In the present embodiment, since the coefficient C2 is stored in the memory 123 of the energy treatment device 120, the energy treatment device 120 having a different material for the resistance pattern 143 can be driven by the same controller 170. In addition, when the material of the resistance pattern 143 is single and the non-uniformity between manufacturing lots is very small, the coefficient C2 may be stored in, for example, the storage unit 187 of the energy treatment device 120. Moreover, the control apparatus 170 may acquire the relationship between the individual identification number of the energy treatment tool 120 and the coefficient C2 with respect thereto, for example, online, or may acquire the information via a medium.

In the present embodiment, the relationship between the individual identification number and the calculated coefficient C1 is stored in the storage unit 187 of the control device 170. However, the memory 123 provided in the energy treatment instrument 120 or other memory You may make it store in.

In this embodiment, the temperature sensor 189 for measuring the environmental temperature is arranged in the control device 170. However, the temperature sensor is arranged in the energy treatment instrument 120, and the measured value of the temperature sensor is controlled by the control device. 170 may be configured to read. In this case, it is particularly preferable that the temperature sensor is disposed in the vicinity of the heat generating chip 140. In this case, the calibration temperature used for calculating the coefficient C1 is not limited to the environmental temperature.

In the present embodiment, Equation (1) is used to calculate the temperature from the resistance value of the resistance pattern 143. However, in order to perform temperature measurement with higher accuracy, the temperature dependence of the resistance temperature coefficient is considered. For this purpose, the following equation (11) can also be used.
T = C1 ′ × R ² + C1 × R + C2 (11)
In this case, the temperature dependence of the resistance temperature coefficient is related to the coefficient C1 ′. Here, C1 ′ also depends on the material of the resistance pattern 143, similarly to C1. For this reason, when the coefficient C1 ′ is used, it can be stored in the memory 123 similarly to C1.

Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, the problem described in the column of problems to be solved by the invention can be solved and the effect of the invention can be obtained. The configuration in which this component is deleted can also be extracted as an invention.

Claims

A therapeutic treatment apparatus (100) for heating and treating a living tissue at a target temperature,
A heat transfer section (132, 134) that contacts the living tissue and transfers heat to the living tissue;
A resistance element (140) that heats the heat transfer section (132, 134) by applying electric power;
A treatment instrument (120) having:
The treatment tool (120) is detachable, can measure the resistance value R of the resistance element (140), supplies power to the resistance element to heat the living tissue at the target temperature, and transfers the heat. A control device (170) for controlling the temperature of the section;
A storage unit (123; 187) for storing the coefficient C2 provided in the treatment instrument or the control device;
Comprising
The control device (170)
In a state where the treatment tool and the control device are connected, the coefficient C1 is calculated based on the calibration temperature,
The temperature T of the resistance element is determined by using the resistance value R, the coefficient C1, and the coefficient C2. T = C1 × R + C2
Calculated by
Controlling the temperature of the heat transfer section using the temperature T;
The therapeutic treatment apparatus (100) characterized by the above-mentioned.
The therapeutic treatment device according to claim 1, wherein the calculation of the coefficient C1 is performed before the heating is started after the treatment tool (120) and the control device (170) are connected. (100).
The calibration temperature is an environmental temperature,
The coefficient C1 is calculated based on the environmental temperature, the measured resistance value R, and the read coefficient C2.
The therapeutic treatment device (100) according to claim 1 or 2, characterized in that
The therapeutic treatment apparatus according to claim 3, further comprising a temperature sensor (189) for measuring the environmental temperature, which is provided in the treatment instrument (120) or the control device (170). (100).
A calculation coefficient storage unit (123; 187) provided in the treatment instrument (120) or the control device (170);
The control device (170) stores the calculated coefficient C1 in the calculated coefficient storage unit (123; 187).
The therapeutic treatment device (100) according to claim 1 or 2, characterized in that
The control device (170) calculates the coefficient C1 when the treatment instrument (120) and the control device (170) are connected for the first time, and calculates the coefficient when the connection is made after the second time. The therapeutic treatment device (100) according to claim 5, wherein the coefficient C1 stored in the storage unit (123; 187) is read out, and the temperature of the heat transfer unit (132, 134) is controlled.